Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea

The biochemical composition of seston along a salinity gradient were examined in the low-turbidity, temperate, estuarine embayment, Gwangyang Bay in Korea. Seasonal variations in sestonic protein (PRT), carbohydrate (CHO), and lipid (LIP) concentrations were analyzed to assess the effects of physiol...

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Autores principales:	Riaz Bibi, Hee Yoon Kang, Dongyoung Kim, Jaebin Jang, Changseong Kim, Goutam K. Kundu, Chang-Keun Kang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	salinity gradient biogeochemical processes Gwangyang Bay suspended particulate matter nutritional conditions primary productivity Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/f00b929283cc441db2d860b3a7ea7e81
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spelling	oai:doaj.org-article:f00b929283cc441db2d860b3a7ea7e812021-11-25T19:15:40ZBiochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea10.3390/w132232212073-4441https://doaj.org/article/f00b929283cc441db2d860b3a7ea7e812021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3221https://doaj.org/toc/2073-4441The biochemical composition of seston along a salinity gradient were examined in the low-turbidity, temperate, estuarine embayment, Gwangyang Bay in Korea. Seasonal variations in sestonic protein (PRT), carbohydrate (CHO), and lipid (LIP) concentrations were analyzed to assess the effects of physiological status and taxonomic composition of phytoplankton. The concentrations of biochemical compounds displayed a close relationship with chlorophyll <i>a</i> (Chl<i>a)</i>. PRT:CHO ratios were high (>1.0) in the estuarine channel in warmer months and in whole bay in February, indicating a N-replete condition for phytoplankton growth. High CHO:LIP ratios (>2.5) in the saline deep-bay area during the warmer months (>2.0) emphasized the importance of temperature and photoperiod over nutritional conditions. The low POC:Chl<i>a</i> (<200), molar C:N (~7) ratios, and biopolymeric carbon concentrations coupled with high primary productivity indicated a low detrital contribution to the particulate organic matter pool. Diatom dominance throughout the year contributed to consistently high carbohydrate concentrations. Furthermore, generalized additive models highlighted that phytoplankton community (i.e., size) structure may serve as an important descriptor of sestonic biochemical composition. Collectively, our results suggest that physiological and taxonomic features of phytoplankton play prominent roles in determining the biochemical composition of seston, supporting the fact that the ecosystem processes in Gwangyang Bay are largely based on phytoplankton dynamics.Riaz BibiHee Yoon KangDongyoung KimJaebin JangChangseong KimGoutam K. KunduChang-Keun KangMDPI AGarticlesalinity gradientbiogeochemical processesGwangyang Baysuspended particulate matternutritional conditionsprimary productivityHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3221, p 3221 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	salinity gradient biogeochemical processes Gwangyang Bay suspended particulate matter nutritional conditions primary productivity Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	salinity gradient biogeochemical processes Gwangyang Bay suspended particulate matter nutritional conditions primary productivity Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Riaz Bibi Hee Yoon Kang Dongyoung Kim Jaebin Jang Changseong Kim Goutam K. Kundu Chang-Keun Kang Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
description	The biochemical composition of seston along a salinity gradient were examined in the low-turbidity, temperate, estuarine embayment, Gwangyang Bay in Korea. Seasonal variations in sestonic protein (PRT), carbohydrate (CHO), and lipid (LIP) concentrations were analyzed to assess the effects of physiological status and taxonomic composition of phytoplankton. The concentrations of biochemical compounds displayed a close relationship with chlorophyll <i>a</i> (Chl<i>a)</i>. PRT:CHO ratios were high (>1.0) in the estuarine channel in warmer months and in whole bay in February, indicating a N-replete condition for phytoplankton growth. High CHO:LIP ratios (>2.5) in the saline deep-bay area during the warmer months (>2.0) emphasized the importance of temperature and photoperiod over nutritional conditions. The low POC:Chl<i>a</i> (<200), molar C:N (~7) ratios, and biopolymeric carbon concentrations coupled with high primary productivity indicated a low detrital contribution to the particulate organic matter pool. Diatom dominance throughout the year contributed to consistently high carbohydrate concentrations. Furthermore, generalized additive models highlighted that phytoplankton community (i.e., size) structure may serve as an important descriptor of sestonic biochemical composition. Collectively, our results suggest that physiological and taxonomic features of phytoplankton play prominent roles in determining the biochemical composition of seston, supporting the fact that the ecosystem processes in Gwangyang Bay are largely based on phytoplankton dynamics.
format	article
author	Riaz Bibi Hee Yoon Kang Dongyoung Kim Jaebin Jang Changseong Kim Goutam K. Kundu Chang-Keun Kang
author_facet	Riaz Bibi Hee Yoon Kang Dongyoung Kim Jaebin Jang Changseong Kim Goutam K. Kundu Chang-Keun Kang
author_sort	Riaz Bibi
title	Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
title_short	Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
title_full	Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
title_fullStr	Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
title_full_unstemmed	Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
title_sort	biochemical composition of seston reflecting the physiological status and community composition of phytoplankton in a temperate coastal embayment of korea
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f00b929283cc441db2d860b3a7ea7e81
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Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea

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